Woodworking machine



Feb; 26, 1929.

' M. SKOLNIK WOODWORKING MACHINE Filed April 1.927 6 Sheets-Sheet 1 I/vven for: Max Skolnlk y W/ W Ktirnez S Inventor.- /7ax S/folnik. By

M. SKOLNIK WOODWORKING MACHINE Flled Aprll 8 1927 Feb 26, 1929.

Feb. 2 6 1929. 1,703,179

7 M. SKOLNIK WOODWORKING MACHINE Filed April 8, 192'? 6 Sheets-Sheet 3 Inveni'or Mqx S/rolnik.

litter-neg? Feb. 26, 1929.

M. SKOLNIK WOODWORKING MACHINE Filed April 8, 1927 6 Sheets-Sheet 5 In ven for": Max Skoln 1k.

'42 turn 65/5.

1,703,179 M. SKOLNIK WOODWORKING MACHINE Filed April 8, 1927 s sheets-sheet 6 Feb. 26, 1929.

In ven for: Max -$kol!u'k Kite/new).

Patented Feb. 26, 1929. v

UNITED STATES PATENT OFFICE. 1

MAX SKOLNIK, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR 'IOv THE SKOLNIK PATENTS, INCORPORATED, OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF INDIANA.

* WOODWORKING MACHINE.

Application filed April 8,

My invention relates to Woodworking machines, and an obj ectin general is to lmprove upon the construction disclosed n my prior applications Serial Number 44,721 filed July 20, 1925, and Serial Number 99,045 filed April 1, 1926. While intended pr marily for use in working on wood, the machine may be employed for working on other materlals and it is therefore to be understood that the term woodworking will not exclude such other uses. One of the objects of the inven tion is to provide power mechanism for driving various tools now commonly driven manually such as tools for planing, groov ng, sawing, grinding, drilling, boring, driving screws, and other tools which are rotated while in use. Another object is to provide a machine of this character having two guide members spaced from each other and upon which a carriage is mounted for reciprocation, one of the guide members being so mounted that it may be given a movement of revolution around the other in parallelism in. order that a tool supported by the carriage may be operated at different angles. Another object is to provide a bed member for supporting material to be operated upon, the bed member being so constructed as to cooperate with a saw which is adjustable for ma l;- ino' cuts at various angles.

The full objects and advantages of my invention will appear in connection with the detailed description thereof, and the novel features of my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings which 1llustrate the application of my invention in one of the forms in which it may be embodied,

Fig. 1 is a perspective view of the machine set up in operative condition. Fig. 2 is a perspective view of the machine on a smaller scale and from which certain parts have been IGI'IIOVOCl. Fig. 3 is a view partly in side ele vation and partly in vertical section. Fig. 4 is a view in section on the'line- 4-4 of Fig. 2 and on a larger .scale. Fig. 5 is view in section on the line 55 of Fig. 4. Fig. 6 is a view in section on the line 66 of Fig. 3. Fig. 7 is a view in section on the line 77 of Fig. 3. Fig. 8 is a view in section on the line 8-8 of Fig. 3. Fig. 9 is a view correspond ing to F ig. 8 but with a saw secured in place. Fig. 1G is a view in section on the line 10 1-10 ntliige 4. Fig. 11. (Sheet 2) is a perspective and 104 eh-ieh secure it insists.

1927. Serial No. 181,906. I

view of a chuck which may be employed.

Fig. 1 2 (Sheet 2) is a perspective view of a grooving tool which may be employed.

As shown in the drawings, 1 provide a cast are parallel to and on a level with ribs 26 and 28 at the two opposite sides respectively of said member. These ribs are reinforced by cross bars 30, 32, and 34 which do not extend up as far as the ribs do. A bar 36 is secured at its ends to transverse rods 38 and 40 extending slidably into the bed member at one side thereof while a bar 42 is secured at its ends to transverse rods 44 and 46 extending slidably into the bed member at the otherside. These bars 36 and. 42 are on a level with the ribs previously referred to and may be pulled out to increase the width of the supporting surface of the bed for boards or other material to be operated upon. One side of the bed is provided at its ends with outwardly curved extensions 48 and 50 as best shown in Fig. 10 and these extensions carry sockets 52 and 54 which receive thelower ends of posts 56 I and 58 held therein by set screws 60 and 62. These posts carry slidable collars 64 and 66 held in adjusted position thereon by thumb screws 68. The collars 64 and 66 are provided with bearings for a shaft 70 onthe ends of which are secured pinions 72 placed between divided portions of the collars and meshing with racks 74 formed in the contiguous surfaces of the posts 56 and 58 as will be understood from Figs. 4 and 5. A crank handle 76 is secured to one end of the shaft 70 for rotating the latterwhereby the collars 64 and 66 may be raised and lowered when the thumb screws 68 are loosened. 64 and 66 carry arms 78 and 8(lwhich have upward projections 82 and 84 provided at their upper ends with lateral extensions 86 and 88 containing arcuate slots 90 and 92. A rod 94 extends through said slots and the ends of this rod are provided with nuts 96 and 98 by means of which the rod is secured in adjusted position in the slots. The free ends of the arms 78 and 80 are provided with openings throu I h which a rod 100 passes, the ends of this to being provided withnuts 102 rods The collars 94 and 100 near their ends are connected by radius bars 106 and 108, it being now observed that the curvature of the slots 90 and .92 is. produced with a point in the axis of the rod 100 as a center. A carriage 110, the construction of which will best be understood from Fig. 2, is adapted to be reciprocated on the rods 94 and 100 as guides. The upper portion of this carriage has two sleevelike members 112 and 114 which fit slidably around the rod 94 while the lower portion of the carriage has two sleevelike members 116 and 118 which fit slidably around the rod 100. The members 112 and 114 are connected by a bar 120 to which an adjustable strap 122 is attached this strap being adapted to encircle an electr c motor 124 and when tightened assisting m holding the motor firmly on the carriage. as best shown in Fig. 3, a casting 126 is attached below the motor by an arm 128 which extends up from the casting and is secured at its upper end to the motor by a screw bolt 1.30. A casting 132 is secured directly to the underside of the motor. This casting has a centrally depressed portion over which fits an upwardly extending annular flange formed as a portion ofa casting 134 which 1s secured to the casting 126. All of these three castings are, therefore, securely held together and supported from the motor. The casting 182 contains a ballbearing device 136 for the motor shaft 138 while the casting 134 contains a ballbearing device 140 which serves to hold the lower end of the motor shaft and the upper end of a tool shaft 142 which has a recess into which fits a tongue 144 on the lower end of a motor shaft whereby these two shafts are coupled together. The lower end of the tool shaft 142 is held in place by a ball hearing device 146 placed in the lower port-ion of the casting 126. The casting 126 has perforated bosses 148 and 150 at its opposite ends. Screw bolts152 and 15-4 pass through these bosses and turn into the carriage 110 as shown in Fig. 4. It will be understood that these scrcw bolts cooperate with the strap 122 for the purpose of holding the motor and the castings attached thereto firmly to the carriage. As shown in Fig. 3, the lower end of the shaft 142 is threaded for the purpose of holding a tool, as for instance, in the form shown there an internally tlu'eaded boss 156 formed centrally upon the upper side of a disk 158, the lower side of which is provided with a plurality of downwardly extending cutters 160 arranged circularly in spaced relation around. the disk as will be clearly understood from Fig. 6. A handle 162 for reciprocating the carriage and the parts carried thereby extends up from one end of the casting 126 and the upper end of this handle is secured by a screw 164 to a. switch box 166 extending out from the motor ca sing and containing a switch operated by a lever 168 for switching on and off electric current suppl led by a cable 170. Two vertically adjustable base members 172 and 174 are carried by the opposite end portions of the supporting casting 126. The base member 172 is in the form of a plate having upturned flanges 17 6 and 178 on its opposite sides while its inner end is concaved as indicated at 180 in Fig. 6 in order to conform to the curvature of the disk 158. Secured to the flanges 176 and 17 9 there are posts 182 and 184 which have vertical channels constituting s'lideways for engagement with the opposite sides of a hollow enlarge ment 186 formed as part of the casting 126. A bar 188 is secured to the tops of the posts 182 and 184 as shown in Fig. 3. 1'1 rod 190 is screwrthreaded at its lower portion for engaging a screwthreaded hole in the closed top of the member 186. This rod is held rotatably by the bar 188 and its upper end is provided with a knob 192 which when turned serves to move in the base member 172111) and down. The lower surface of this base member rests upon planed material as will be understood from Fig; 3 and is intended to be kept flush with the lower ends of the cutters for pla-ining purposes. Adjustment may be readily made by turning the knob 192 when cutters of differentlength from those shown are used, and also to compensate for wear of the cutting edges of the cutters. The other base member 174 is also in the form of a plate having upturned flanges 194 and 196 on its opposite sides while its inner end is coneaved as indicated at 198 in Fig. 6 in order to conform to the curvature of the disk 158. Secured to these flanges there are posts 200 and 202 which have vertical channels constituting slideways for engagement with the opposite sides of a hollow enlargement 204 formed as part of the casting 126. A bar 206 is secured to the tops of the posts 200 and 202 as best shown in Fig. 7. A rod 208 is screwthreaded at its lower portion for engaging a screw-threaded hole in the closed top of the member 204. This rod is held rotatably by the bar 206 and its upper end is provided with a knob 210 which when turned. serves to move the base member 174 up and down. One end of the bar 206 is turned downwardly to provide a flange 212 through which passes a screw 214 adapted to be turned into engagement with the post 200 and thus lock the base member 174 in adjusted position, The lower surface of this base member rests upon the unplaned material as will be understood from Fig. 8 and itsposition as adjusted vertically determines the depth out. In other words the depth of cut is equal. to the difference in level between the lower surfaces ofthe two base members 172 and 174. It is obvious that a locking screw constructed and supported in the same manner as the locking screw 214 may be used in connection with the base men]: her 172. As will be understood from the central pertirm of the cas -i 126 is cupshaped to form a gear housing 216, the upper end of which is partly closed by the casting 134. The bottom of thehousing 216 is provided with a plug 217 which permits the removal of accumulated dirt and spent oil. A

I which it is desired to rotate may be placed within the sleeve 222 and secured for rotation therewith for which purpose the sleeve is provided with a notch 228 at one end thereof. As shown in Figs. 1 and 9, a saw arbor 230 is secured in thesleeve, the arbor having a pin 232 near one end this end being provided with a saw 234. Thepin 232 fits into the notch 228 and the other end of the arbor is provided with a thumb screw 236 which renders it easy to remove and apply the arbor with relation to the sleeve. As will be understood from Fig. 11, the shank 238 of a toolholding chuck 240 may be secured in. the sleeve 222 for rotation thereby and it will be obvious that various tools may be rotated by means of the sleeve. In order to insure against accidents when the saw is used, I pro vide a main saw guard 242 which carries an auxiliary saw guard 244 hinged thereto bya pintle 246 so that the guard 244 may be turned down over the lower edge of the saw when the latter is not in use. 'A spring 247 serves to retain the guard 244 in down position when it not held up by suitable means. Fig. 1 shows a finger 248 secured to the guard 242 by a screw 250 by means of which the finger may be held up in the position shown. When the screw is loosened, the finger may be turned down and again secured by the screw so that it will follow the saw and prevent the board which is being sawed from pinching the saw. It is obvious that difi'erent forms of cutting devices maybe operated by the shaft 142, for instance, Fig. 12 shows a grooving tool 252 formed with a socket portion 254 which may be screwed upon the lower end of the shaft 142 when the disk 158 is removed. The operation and advantages of my invention will now be obvious. When the machine is used for planing material placed on the bed member, the carriage may be quickly adjusted by turning the crank handle 76 so as to bring the cutters at the proper height for various thicknesses of material. By loosening the nuts 96 and 98, the rod 94 may be given a movement of revolution so that an inclined surface may be planed. The depth of cut is easily regulated by adjusting the base member 174 u and down. The width of this base mem r is greater than the diameter of the disk 158 as shown in Fig. 6 and the corners of the base member on the side adjacent the cutting disk extend beyond the center of said disk. For planing purposes, the base member 172 is set flush with the lower ends of the cutters. The

width of the latter-base member is somewhat less than the diameter of the disk 158 so that there is no liability of this base member terial.- When the grooving tool 252 is used, the base member 172 may be moved up so travelingupon unplaned portions of the maas to be on the same level'as the base member 75 174. When the auxiliary guard 244 is turned down so as to extend below the lower margin of the'saw, the machine may be safely used for planing and grooving without removing the saw. In the form shown in Fig. 1, thei saw is so positioned as to make vertical cuts, but the cut will be made with an inclined relation to the edge of the board if the latter is placed so as to have an inclined rather than longitudinal or crosswise position on the bed member. By adjusting the rod 94, in the manner previously mentioned, cuts varying from to 45 relatively to the vertical may be made. The construction illus-v trated is such that when the rod 94 is moved thetops of theribs on the bed plate for all different angles of out. With the arrangement shown, the lower margin of the saw will be positioned as follows for different angles which may be indicated by suitable graduations: 0 to 5, between the ribs 161.

and 18; 5 to between the ribs 18 and 20;

15 to between the ribs 20 and 22; 30

to 45, between the ribs 22 and 24. For 1 planing, grooving and sawing, the carriage is reciprocated by the operator who grasps:

the handle 162 for this purpose and closes the switch to cause the tool shaft to rotate.

I claim:

1. A woodworking machine comprising a bed member having an open work central portiion, ribs extending longitudinally across said portion, a horizontal guide carried by said bed member, a carriage mounted for reciprocation on said horizontal guide, a motor mounted on said carriage for movement therewith, a shift rotatably mounted on said carriage, a saw secured to said shaft, dr ving connections between said motor and said shaft, and means whereby said saw may he tilted, said saw when tilted into different positions having its lower margin disposed between different ones of said ribs.

2. A woodworking machine comprising a bed member having an openwork central portion, ribs extending longitudinally across said portion, two guide members carried by said bed member and spaced from each other, means whereby one of said guide members may be given a movement of revolution around the other in parallelism therewith,

'llO

a carriage mounted for reciprocation on. said guide members, a motor mounted on said carriage for movement therewith, a shaft rotatably mounted on said carriage, a saw secured to said shaft, and driving connections between said motor and said shaft, said saw when tilted into different positions hav ing its lower margin disposed between different ones of said ribs.

3. A woodworking machine con'iprising a support, a motor mounted on said support, a vertical shaft carried by said support and driven by said motor, a horizontally disposed disk secured to the lower end of said shaft, a plurality of downwardly extending spaced cutters secured around the margin of said disk for planing material, and two vertically adjustable base members carried by said support at different levels on opposite sides of said disk, one of said members resting upon the unplaned material and the other member having a width less than the diameter of said disk and resting upon the planed ma terial.

4. A woodworking machine comprising a bed member, two posts extending up from said bed member, collars surrounding said posts, means for raising and lowering said collars, arms extending out from said collars, a guide rod connecting said arms, projections extending from said arms and containing arcuate slots whose center of curvature lies in the axis of said guide rod, a second guide rod extending through said slots, means for securing said second guide rod in adjusted position in said slots, a carriage mounted for reciprocation on said guide rods, a motor mounted on said carriage for movement therewith, a tool operatively supported by said carriage, and driving connections between said motor and said tool.

5. A woodworking machine comprising a bed member, two posts extending up from said bed member, said posts being provided with rack teeth, collars surrounding said posts, a shaft rotatably supported by said collars, pinions secured to said shaft and meshing with said rack teeth, a crank handle secured to one end of said shaft, aguide car ried by said collars, a carriage mounted for reciprocation on said guide, a motor mounted on said carriage for movement therewith, a tool operatively supported by said carriage, and driving connections between said motor and said tool.

6. A woodworking machine comprising a support, ribs extending longitudinally of said support, a guide carried by said sup port, a carriage mounted for reciprocation on said guide, a shaft rotatably mountedon said carriage, a motor for driving said shaft, a saw secured to said shaft, and means whereby said saw may be tilted, said saw when tilted into different positions having its margin disposed between different ones of said ribs.

'7. A woodworking machine comprising a support, ribs extending longitudinally of said support, two guide members carried by said support and spaced from each other, means whereby one of said guide members may be given a movement of revolution around the other in parallelism therewith, a carriage mounted for reciprocation on said guide members, a shaft rotatably mounted on said carriage, a motor for driving said shaft, and a saw secured to said shaft, said saw when tilted into different positions having its mar-gin disposed between different ones of said ribs. 7

8. A woodworking machine comprising a support, two posts extending from said support, collars surrounding said posts, means for moving said collars along said posts, arms extending out from said collars, a guide rod connecting said arms, projections extending from said arms and containing'arcuate slots whose center of curvature lies in the axis of said guide rod, a second guide rod extending through said slots, means for securing said second guide rod in adjusted position in said slots, a carriage mounted for reciprocation on said guide rods, a tool operatively supported by said carriage, and a motor for driving said tool.

9. A woodworking machine comprising a support, two posts extending from said support, said posts being provided with rack teeth, collars surrounding said posts, a shaft rotatably supported by said collars, pinions secured to said shaft and meshing with said rack teeth, a crank handle secured to one end of said shaft, a guide carried by said collars, a carriage mounted for reciprocation on said guide, a tool operatively supported by said carriage, and aimotor for driving said tool.

In testimony whereof I hereunto affix my signature.

MAX SKOLNIK. 

